
Extension Instruction Specifications
3-27
Bit 31
Bit 0
1
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Dn before execution
Dn after execution
Search range
Search direction
MSB
LSB
BSCH (Bit search instruction)
[Instruction Format (Macro Name)]
BSCH Dm, Dn
[Assembler Mnemonic]
udf07 Dm, Dn
[Operation]
Bit search is performed within the bit string of the 32 bits contained in Dm from the bit position of the bit number
indicated by the contents of Dn - 1 in the direction that the bit number becomes smaller. The bit number of the first
bit position where a "1" is found is written into Dn.
When the contents of the lower 5 bits of Dn are 0, bit search is performed from bit 31 in the direction that the bit
number becomes smaller.
If search is performed up to the bit position of bit 0 without finding a "1", the C flag is set, Dn is set to 0x00000000,
and instruction execution ends.
When instruction execution starts, the upper 27 bits of Dn are ignored.
[Flag Changes]
When search was successful ("1" was found)
Flag
Change
Condition
V
*
Undefined
C
0
This indicates that search was successful.
N
*
Undefined
Z
*
Undefined
When search failed ("1" was not found)
Flag
Change
Condition
V
*
Undefined
C
1
This indicates that search failed.
N
*
Undefined
Z
*
Undefined
[Programming Cautions]
PSW updating by flag changes is delayed by one instruction.
However, Bcc and Lcc instructions can evaluate flags without waiting for flag reflection to PSW.
The operations of "udf07 imm8, Dn", "udf07 imm16, Dn" and "udf07 imm32, Dn" are not assured. In addition, a
system error interrupt does not occur in these cases.
Содержание MN103001G/F01K
Страница 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Страница 2: ......
Страница 4: ......
Страница 6: ......
Страница 7: ...14 A D Converter 15 I O Ports 16 Internal Flash Memory 17 Ordering Mask ROM Appendix 14 15 16 17 ...
Страница 8: ......
Страница 9: ...Table of Contents List of Figures and Tables 0 ...
Страница 26: ...xviii ...
Страница 27: ...1 0 1 General Specifications ...
Страница 35: ...2 CPU 2 ...
Страница 57: ...3 Extension Instruction Specifications 3 ...
Страница 96: ...Extension Instruction Specifications 3 40 ...
Страница 97: ...4 Memory Modes 3 4 ...
Страница 102: ...Memory Modes 4 6 ...
Страница 103: ...5 Operating Mode 5 ...
Страница 107: ...6 Clock Generator 6 13 ...
Страница 111: ...7 Internal Memory 7 ...
Страница 114: ...Internal Memory 7 4 ...
Страница 115: ...8 Bus Controller BC 8 ...
Страница 189: ...9 Interrupt Controller 9 ...
Страница 220: ...Interrupt Controller 9 32 ...
Страница 221: ...10 8 bit Timers 9 10 ...
Страница 254: ...8 bit Timers 10 34 ...
Страница 255: ...11 16 bit Timers 11 ...
Страница 292: ...16 bit Timers 11 38 ...
Страница 293: ...12 Watchdog Timer 11 12 ...
Страница 302: ...Watchdog Timer 12 10 ...
Страница 303: ...13 Serial Interface 13 ...
Страница 354: ...Serial Interface 13 52 ...
Страница 355: ...14 A D Converter 14 ...
Страница 367: ...15 I O Ports 15 ...
Страница 431: ...16 Internal Flash Memory 16 ...
Страница 439: ...17 17 Ordering Mask ROM ...
Страница 442: ...Ordering Mask ROM 17 4 ...
Страница 443: ...Appendix ...